class initValueHolder:
    def __init__(self):
        self.initValue = None
    def setInitValue(self, initValue):
        self.initValue = initValue
    def getInitValue(self):
        return self.initValue

class estimateHolder:
    def __init__(self):
        self.initEstimate = None
    def setInitValue(self, initEstimate):
        self.initEstimate = initEstimate
    def getInitValue(self):
        return self.initEstimate

class functorClass:
    def functor():
        pass

class initializeNodeClass:
    def initialize():
        pass

    